James 1:19-21
19 My dear brothers, take note of this: Everyone should be quick to listen, slow to speak and slow to become angry, 20 for man's anger does not bring about the righteous life that God desires. 21 Therefore, get rid of all moral filth and the evil that is so prevalent and humbly accept the word planted in you, which can save you.
Ephesians 4:25,26
25 Therefore each of you must put off falsehood and speak truthfully to his neighbour, for we are all members of one body. 26 "In your anger do not sin": Do not let the sun go down while you are still angry.
1 Timothy 2:8
8 I want men everywhere to lift up holy hands in prayer, without anger or disputing.